I'm looking for a way to have a global component, so that my webview in it wont reset every time i switch over with Router to that parent's component.
Any ways to make save webviews data with redux so it won't reset each time, or a global component?
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I have put console log inside of my functional component file. In this file render whenever the API called. If I called API in some other file and the API not related to that file still got logs. I am not sure why. I have checked useEffect and usestate but no clue. Even search from google no clue.
I am using Usestate to store and useEffect to reloaded the the page when data change
I am using apisauce to call the API
React native navigation bottomtab to navigate the screen
Using React.memo but still page rendered.
Any one please help me to resolve this issue. because I am new to react native.
React components automatically re-render whenever there is a change in their state or props. A simple update of the state, from anywhere in the code, causes all the User Interface (UI) elements to be re-rendered automatically.
However, there may be cases where the render() method depends on some other data. After the initial mounting of components, a re-render will occur when:
A component’s setState() method is called.
A component’s forceUpdate() method is called.
Warning: You should normally try to avoid all uses of forceUpdate() and only read from this.props and this.state in render().
So in my app I have a main component which have switch navigator and then inside switch navigator I have a tab navigator which renders different screens. I have registered notification handler in top component.
Now the problem is that when notification is received, I want to make some changes on screens inside tab navigator.
I have read about redux which will provide common store so state could be updated but I dont want to use that.
I have also read about lifting state up but in my case i have more nested components so I dont want to do that as well.
So suggest me some way to do it?
I have solved the problem by using react context api. It is simple wrap your top level component with provider and define some veriable and access that variable in any component.
I'm trying to update a component after receiving props from redux using componentWillReceiveProps. On the next instance that props are sent to the component by redux componentWillReceiveProps does not fire a second time. Any idea why this is happening and the best lifecycle component to use in such a situation?.
How to pass props from one page to another without using navigation props?
Values can be passed by navigation props but without that how to do so?
This is a very broad question, but I will attempt an answer. The answer of course is, it depends. If you do not want to use navigation, then I recommend you lift up the state. In other words, place the the props to want to pass between screens in the state of a component that is the parent of both screens. The parent component can set the props of its children based on the state. You can use callback props on the children to set the parent components' state.
Another way to lift up the state and share data between components is to use a global state manager such as Redux. This allows you to have any component set the global state and have any component take in portions of the global state as props.
Either of these options will allow you to pass data between components.
The app I am building has a root client object that affects all of the subsequent views of the app. I want the user to be able to change clients and have all of the tabs reset, i.e. popToTop() and update the client appropriately.
I have a TabBarIOS component with 4 tabs, each tab is a NavigatorIOS component that manages the subsequent ListView components. How can I force all the NavigatorIOS components to popToTop() and re-render based on a client change?
Thanks in advance.
One simple approach would be to use an event emitter. Create an event emitter and pass it down to the component that owns the NavigatorIOS components. The owner can use the ref prop of each NavigatorIOS component to get a reference to each navigator.
The owner then can add a listener to the event emitter, and call popToTop() on each navigator when the listener is invoked. Then, it's just a matter of emitting the event when appropriate.